Heat exchanger and refrigeration and air-conditioning apparatus

Abstract

A heat exchanger includes a first flat pipe including plural through-holes through which a high-temperature fluid flows, a second flat pipe including plural through-holes through which a low-temperature fluid flows, a first tubular shape inlet header connected to one end of the first flat pipe, a first tubular shape outlet header connected to another end of the first flat pipe, a second tubular shape inlet header connected to one end of the second flat pipe, and a second tubular shape outlet header connected to another end of the second flat pipe. The first and second flat pipes are stacked with contacting flat surfaces. The low-temperature fluid flowing into the through-holes in the second flat pipe from the second inlet header is a fluid in a two-phase gas-liquid state, and flows into those through-holes in a substantially horizontal direction or in an upward direction relative to the substantially horizontal direction.

1 - 9 . (canceled) 
     
     
         10 . A heat exchanger comprising:
 a main body in which a plurality of through-holes are arranged in parallel to each other as a first passage section and a plurality of through-holes aligned with the first passage section are arranged in parallel to each other as a second passage section, the main body being integrally formed with the first passage section and the second passage section, wherein   the main body is formed with a second inlet header as a hole that communicates with the plurality of through-holes of the second passage section,   the second inlet header is formed to shift a position away from the through-holes aligned with the first passage section relative to a connection position between the second inlet header and the plurality of through-holes of the second passage section.   
     
     
         11 . A refrigeration and air-conditioning apparatus comprising the heat exchanger of  claim 10 . 
     
     
         12 . The heat exchanger of  claim 10 , wherein
 the second inlet header has a central axis, and   in case of observing in a direction of the central axis, the central axis is disposed at the position away from the through-holes aligned with the first passage section relative to the connection position between the second inlet header and the through-holes of the second passage section.   
     
     
         13 . The heat exchanger of  claim 10 , wherein
 the main body includes a first inlet header and a first outlet header as holes that communicate with the plurality of through-holes of the first passage section, and   the main body includes a second outlet header as a hole that communicates with the plurality of through-holes of the second passage section.   
     
     
         14 . The heat exchanger of  claim 13 , wherein
 a hole of the first inlet header, a hole of the second inlet header, a hole of the first outlet header, and a hole of the second outlet header are each a shifted position in an extending direction of through-holes of the first passage section or the second passage section.   
     
     
         15 . A method for heat exchange that uses the heat exchanger of  claim 10 , comprising:
 flowing a two-phase gas-liquid fluid into the second passage section, the two-phase gas-liquid fluid being lower temperature than a fluid flowed into the first passage section.   
     
     
         16 . The method for heat exchange of  claim 15 , wherein
 an extending direction of the plurality of through-holes of the second passage section is set to a vertical direction, and   a direction for the second inlet header to communicate is set to a horizontal direction.   
     
     
         17 . The method for heat exchange of  claim 16 , further comprising:
 flowing the fluid into the second passage section upward from the second inlet header.   
     
     
         18 . The method for heat exchange of  claim 15 , wherein
 an extending direction of the plurality of through-holes of the second passage section is set horizontally, and   in case of observing in a central-axis direction of the second inlet header, a direction from a position of a central-axis of the hole of the second inlet header to a connection position between the second inlet header and the through-holes of the first passage section is set upward relative to a horizontal direction.